When importing FBX animations (generated by Cinema 4d or Blender) the models come in very far way and cannot resize or zoomed in. I have tried every setting from both programs to no avail. Is there a secret to providing the right export options? When importing without animations/and rigging the model imports fine and correct size. But once motion is included, something is awry. I also tried changing base units in Converter, but did not work. I have attache my model heirarchy in C4D as well as the imported result. It appears the animation is imported, as I can see it move, but can barely see it :)
Re: "Sounds like the issues are stemming from the 3d software and not Converter." I'd agree and these developer forums may not be the best place to find what you seek.
Instead, try reaching out the C4D or Blender community for export tips.
IIRC Blender has done a lot of work on USDZ export. I don't know enough about C4D to provide more feedback on that.
Again, the most pragmatic tip I can provide here is to favor USDZ over FBX.